The application of two-dimensional layered hybrid materials in supercapacitor electrodes has high energy density. However, the hybrid assembly and electrochemical energy storage mechanism of multifarious layered electrode materials are still unclear. In this work, a two-dimensional interstratification assembly hybrid electrode by using electrostatic assembly between MXene modified with cetyl trimethylammonium bromide cation (CTAB) and NiCo-LDHs modified with dodecyl benzene sulfonic acid anion (DBS) is presented. As a result, the self-restacking of MXene and NiCo-LDHs nanosheets are effectively prevented, leading to a regular interstratification structure and large interlayer spacing, which accelerate diffusion of electrolyte ions and possess more electrochemical activity sites. The freestanding MXene/NiCo-LDHs electrode displays a much higher specific capacitance of 1207 F g⁻¹ at a scan rate of 0.5 A g⁻¹, an impressive rate capability with 93% capacitance retention after 5000 cycles. Moreover, it shows maximum energy density of 107.3 Wh kg⁻¹ (98.5 mWh cm⁻³) at a power density of 571 W kg⁻¹ (524 mW cm⁻³), which is among the highest values reported for MXene and NiCo-LDHs based materials in aqueous electrolytes. This significant electrochemical performance is mainly attributed to hydration of two-dimensional electrodes and exchange or adsorption of interlayer anion-cation.

二维分层混合材料在超级电容器电极中的应用具有很高的能量密度。然而，多种层状电极材料的混合组装和电化学储能机理仍不清楚。在这项工作中，通过在十六烷基三甲基溴化铵阳离子（CTAB）改性的MXene与十二烷基苯磺酸阴离子（DBS）改性的NiCo-LDHs之间进行静电组装，提出了一种二维复层组装混合电极。结果，有效地防止了MXene和NiCo-LDHs纳米片的自重堆积，导致规则的层间结构和较大的层间间隔，这加速了电解质离子的扩散并具有更多的电化学活性位。^-1以0.5克的扫描速率^-1，5000次循环后的令人印象深刻的倍率性能与93％的电容保持率。此外，它显示的最大能量密度为107.3千克瓦^-1（98.5 mWh的厘米^-3，在571公斤w ^的功率密度）^-1（524毫瓦厘米^-3报道MXene和NiCo-），这是最高的值中水性电解质中基于LDHs的材料。这种显着的电化学性能主要归因于二维电极的水合作用和层间阴离子阳离子的交换或吸附。